diff --git a/moodle/Sniffs/NamingConventions/ValidFunctionNameSniff.php b/moodle/Sniffs/NamingConventions/ValidFunctionNameSniff.php
index 83078a86..874f9869 100644
--- a/moodle/Sniffs/NamingConventions/ValidFunctionNameSniff.php
+++ b/moodle/Sniffs/NamingConventions/ValidFunctionNameSniff.php
@@ -65,7 +65,7 @@ class ValidFunctionNameSniff extends AbstractScopeSniff {
         'offsetSet',
         'offsetUnset', // Defined by the PHP ArrayAccess interface.
         'tearDownAfterClass',
-        'jsonSerialize'
+        'jsonSerialize',
     );
 
     /**